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Finding the Fourth Proportional to 621,811.80, 932,717.70 and 172,531.80

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Solution

The fourth proportional to 621,811.80, 932,717.70 and 172,531.80 is: 258,797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,811.80 : 932,717.70 = 172,531.80 : x
  2. Step 2: Convert to fraction form
    621,811.80/932,717.70 = 172,531.80/x
  3. Step 3: Cross multiply
    621,811.80x = 932,717.70 × 172,531.80
  4. Step 4: Simplify right side
    621,811.80x = 160,923,463,672.86
  5. Step 5: Solve for x
    x = 160,923,463,672.86/621,811.80
  6. Step 6: Final answer
    x = 258,797.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.